Hello again. I've got a normal chao and made it into a Sonic chao. Almost anyway. It is green and try as I might I couldn't get it blue, even though on another website it says "Spend a lot of time with it as Sonic and it will go blue" P.S: This is on SA2:B, and thanx for answering my other question
Spending time with it as Sonic has nothing to do with it; it just needs to finish second evolution, which in this case involves giving it more green drives until its colour changes to blue, its ears and spines grow longer, and its tummy and hands go darker. If it's too old though, it won't change form anymore on that life.

~ Crazy C Lea